Elevated Serum CD95/FAS and HIF-1α Levels, but Not Tie-2 Levels, May Be Biomarkers in Patients With Severe Endometriosis: A Preliminary Report

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This preliminary report investigated serum levels of CD95/FAS, HIF-1α, and Tie-2 in severe endometriosis patients, finding elevated CD95/FAS and HIF-1α but not Tie-2.

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Abstract

STUDY OBJECTIVE: To evaluate serum values of cluster of differentiation 95 (CD95/FAS), hypoxia-inducible factor 1-alpha (HIF-1α), and tyrosine kinase receptor 2 (Tie-2) as possible biomarkers of disease presence and severity in women with endometriosis, and to characterize the changes in these values in women with stage I/II and stage III/IV endometriosis. DESIGN: Prospective study (Canadian Task Force classification I). SETTING: University hospital. PATIENTS: Thirty women with endometriosis and 30 healthy women without endometriosis. INTERVENTION: For the diagnosis of endometriosis and prediction of its severity, we measured the serum levels of CD95/FAS, which assess apoptotic conditions, and of HIF-1α and Tie-2, which assess angiogenesis. Endometriosis was diagnosed and staged through surgical laparoscopy and later confirmed histologically. During the surgery, the patients with endometriosis were divided into 2 groups based on disease stage. Eleven patients had stage I/II endometriosis, and 19 had stage III/IV endometriosis. MEASUREMENTS AND MAIN RESULTS: Endometriosis was associated with increased serum CD95/FAS and HIF-1α levels, but not Tie-2 levels. We also determined that stage III/IV endometriosis was associated with higher serum CD95/FAS and HIF-1α levels, but not Tie-2 levels, compared with stage I/II endometriosis. CONCLUSION: Endometriosis, in accordance with its severity, increases serum CD95/FAS and HIF-1α levels, but not Tie-2 levels. These biomarkers may be useful for reproductive surgeons to improve the quality of counseling women about the presence and severity of endometriosis.

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Condition tags

endometriosis

MeSH descriptors

Endometriosis fas Receptor Hypoxia-Inducible Factor 1, alpha Subunit Receptor, TIE-2 Adult Adult Biomarkers Biomarkers Biomarkers Case-Control Studies Case-Control Studies Endometriosis Endometriosis Endometriosis Endometriosis fas Receptor fas Receptor Female Female Humans

Citation neighborhood (2-hop)

Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. Outer rings show 2-hop neighbours — papers reached through the immediate citers/citees. [ collapse to 1-hop ]

References (31)

Cited by (12)

Source provenance

europepmc
last seen: 2026-10-21T06:16:17.486033+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
pubmed
last seen: 2026-10-08T21:17:17.422830+00:00
License: CC0 · commercial use OK